 The technique called the reverse face view provides detailed and reliable information on congenital defects of the fetal palate; hitherto only defects of the lips and alveolus could be visualised by existing techniques.He was also the first to describe patterns of fetal behaviour such as blinking, smiling, crying and reflexes in early pregnancy.Many of his images and moving 3D sequences of fetal behaviour have been used in television documentaries such as "My Fetus", "Life Before Birth" and "In The Womb".